| 摘要 |
<p>Disclosed herein is a method for radio communications in a wireless communication system including one or more base stations and one or more user terminals; the method comprising performing a radio communication between a base station (16) and a user terminal (17) of said wireless communication system; wherein performing a radio communication includes transmitting, in a given time slot, first digital symbols by using a frequency-division technique, whereby the first digital symbols are carried by first frequency samples at respective sub-carriers, that are distributed over a predefined frequency band and belong to a given sub-carrier block; the method being characterized in that performing a radio communication further includes transmitting, in said given time slot, also second digital symbols by means of one or more frequency twisted modes, wherein each frequency twisted mode carries a respective orbital angular momentum mode with a respective topological charge different than zero by means of respective second frequency samples, that: are phase-shifted with respect to each other on the basis of phase shifts related to said respective orbital angular momentum mode; carry one or more respective symbols of said second digital symbols via said respective orbital angular momentum mode; and are at respective frequencies, that are distributed over said predefined frequency band and are different than the sub-carriers belonging to said given sub-carrier block.</p> |
